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CalcSpillWeights: allow overidding the spill weight normalizing function

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This will enable the PBQP register allocator to provide its own normalizing function.

No functionnal change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194417 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnaud A. de Grandmaison
2013-11-11 19:56:14 +00:00
parent ef572e31e2
commit d736763847
2 changed files with 16 additions and 6 deletions
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15
include/llvm/CodeGen/CalcSpillWeights.h
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@ -43,16 +43,23 @@ namespace llvm {
/// \brief Calculate auxiliary information for a virtual register such as its
/// spill weight and allocation hint.
class VirtRegAuxInfo {
public:
typedef float (*NormalizingFn)(float, unsigned);
private:
MachineFunction &MF;
LiveIntervals &LIS;
const MachineLoopInfo &Loops;
const MachineBlockFrequencyInfo &MBFI;
DenseMap<unsigned, float> Hint;
NormalizingFn normalize;
public:
VirtRegAuxInfo(MachineFunction &mf, LiveIntervals &lis,
const MachineLoopInfo &loops,
const MachineBlockFrequencyInfo &mbfi)
: MF(mf), LIS(lis), Loops(loops), MBFI(mbfi) {}
const MachineBlockFrequencyInfo &mbfi,
NormalizingFn norm = normalizeSpillWeight)
: MF(mf), LIS(lis), Loops(loops), MBFI(mbfi), normalize(norm) {}
/// \brief (re)compute li's spill weight and allocation hint.
void calculateSpillWeightAndHint(LiveInterval &li);
@ -62,7 +69,9 @@ namespace llvm {
/// live intervals.
void calculateSpillWeightsAndHints(LiveIntervals &LIS, MachineFunction &MF,
const MachineLoopInfo &MLI,
const MachineBlockFrequencyInfo &MBFI);
const MachineBlockFrequencyInfo &MBFI,
VirtRegAuxInfo::NormalizingFn norm =
normalizeSpillWeight);
}
#endif // LLVM_CODEGEN_CALCSPILLWEIGHTS_H